He often read the priest's old books and got him to explain and enlarge upon them.

他经常阅读神甫的旧书，请他解释并扩展。

I need not enlarge upon this matter.

我不必详细论说这件事。

She began to enlarge upon the subject.

她开始顺着话题说下去。

Could you enlarge upon your suggestion?

你能不能详细谈谈你的建议。

I wish to enlarge upon a statement made by Gary Docking.

我想就加里·多金的话再展开说一下。